kids fort

I was at a craft fair this past fall and saw a kids fort that covered a table and the kids played under it.  I LOVED IT!!!  The price of this great fort was over my budget so I passed and said I could make that (wink in my spare time right, still wanting to make it). My point is here are directions for something similar, not as detailed as the one I saw at the fair.  My idea for this is to use a table cloth so that I can wipe it clean but  sheet you can just throw in the wash (the one at the craft fair was felt).  I am going to try and go to goodwill today maybe  will look for a sheet......